Carol felt tired. She felt tired the time. She didn’t use to tired. She used to have a of energy. Why was she so all the time? “You should eat sugar,” her friend told her. “Sugar give you energy.” But Carol didn’t to eat more sugar. More sugar give her more weight. She didn’t to put on weight. She wanted have energy again. She finally decided see a doctor. Her doctor told that she had a thyroid problem. “ is a thyroid?” she asked her . "It can make you feel very . But don't worry, I can fix ," he told her.